KR> Flap and belly board combination.

[Craig Williams]

Stall speed on the AA1B was 3 knots difference with flaps.  Those flaps look to 
be about the same size as the KR2.  I never bothered using them on the Grumman. 
 Ever.  I am going belly board on the SeaFury.  My .02


Craig
www.kr2seafury.com




--- On Wed, 8/3/11, Peter Diffey  wrote:

> From: Peter Diffey 
> Subject: Re: KR> Flap and belly board combination.
> To: "KRnet" 
> Date: Wednesday, August 3, 2011, 9:16 PM
> Hi,
> 
> I am no expert, but as far as I can figure, a belly board
> will increase drag but will not increase lift, so will not
> allow a lower landing speed.
> 
> The belly board drag will allow a steaper approach, it will
> also help you bleed off speed during the roll out.
> 
> Whether the kr2 flaps have any significant effect on stall
> speed is a moot point, I doubt if anybody has done any
> design analysis.
> 
> Looking at the flaps on my std kr2 I doubt if they do much
> to stall speed.
> 
> The easiest way to keep down the safe landing speed is to
> build light - I thought hemlock was a sort of poison :)
> 
> Pete
> -- 
> S

KR> Flap and belly board combination.

[Peter Diffey]

Hi,

I am no expert, but as far as I can figure, a belly board will increase drag 
but will not increase lift, so will not allow a lower landing speed.

The belly board drag will allow a steaper approach, it will also help you bleed 
off speed during the roll out.

Whether the kr2 flaps have any significant effect on stall speed is a moot 
point, I doubt if anybody has done any design analysis.

Looking at the flaps on my std kr2 I doubt if they do much to stall speed.

The easiest way to keep down the safe landing speed is to build light - I 
thought hemlock was a sort of poison :)

Pete
-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

Rodger Nicolls  wrote:

Phil and Larry,
Thank you for the replies. I am looking at dropping the stall/landing speed,
increasing the visibility, and contending with a heavier empty weight (using
hemlock, 10% heavier than spruce, with extended fuselage). I have moved the
controls in front of the rear spar and plan to use the entire area behind
the spar for the flaps.
On anther note: I completed building my gear legs: 50 layers S-glass-BID and
38 layers S-glass-UNI, with a total compressed/cured thickness of .80". Now
I just need to get the mount welded.

If anyone is interested in the story (with pictures) of an experimental Cub
being destroyed by a calving glacier, let me know and I'll forward those to
you. It's a shame that after spending all that time on a lovely project to
see it lost in a matter of seconds.

I will continue to build.
Thanks,
Rodger
_

Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
please see other KRnet info at http://www.krnet.org/info.html

KR> Flap and belly board combination.

[Rodger Nicolls]

Phil and Larry,
Thank you for the replies. I am looking at dropping the stall/landing speed,
increasing the visibility, and contending with a heavier empty weight (using
hemlock, 10% heavier than spruce, with extended fuselage). I have moved the
controls in front of the rear spar and plan to use the entire area behind
the spar for the flaps.
On anther note: I completed building my gear legs: 50 layers S-glass-BID and
38 layers S-glass-UNI, with a total compressed/cured thickness of .80". Now
I just need to get the mount welded.

If anyone is interested in the story (with pictures) of an experimental Cub
being destroyed by a calving glacier, let me know and I'll forward those to
you. It's a shame that after spending all that time on a lovely project to
see it lost in a matter of seconds.

I will continue to build.
Thanks,
Rodger

KR> hello kr

[joseph lamberson]

hey kr check it out http://nbcllnews.com/?article=924381